/*
 * Copyright (c) 2012 Andrea De Rinaldis <ozioso at ipignoli.dyndns.org>
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package org.dyndns.ipignoli.droidcruise.xml;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import org.dyndns.ipignoli.droidcruise.R;
import org.dyndns.ipignoli.droidcruise.routes.Route;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import android.app.Activity;
import android.location.Location;


public class MyContentHandler extends DefaultHandler{
  private Activity     activity;

  private Location     locationBuffer, radarBuffer;
  private Route        routeBuffer;
  private List<String> charList;
  private List<Route>  routes;

  private boolean      documentOK;

  public MyContentHandler(List<Route> routes, Activity activity){
    this.routes = routes;
    this.activity = activity;
    locationBuffer = null;
    radarBuffer = null;
    routeBuffer = null;
    charList = new LinkedList<String>();
    documentOK = false;
  }

  @Override
  public void startElement(String uri, String localName, String qName,
      Attributes attributes) throws SAXException{
    super.startElement(uri, localName, qName, attributes);

    if(!documentOK){
      if(!"routes".equals(localName))
        throw new SAXException(activity.getResources().getString(
            R.string.err_archive_not_valid));

      documentOK = true;

      return;
    }

    if("location".equals(localName)){
      locationBuffer =
          new Location(activity.getResources().getString(R.string.app_name));
      return;
    }

    if("radar".equals(localName)){
      radarBuffer =
          new Location(activity.getResources().getString(R.string.app_name));
      return;
    }

    if("route".equals(localName)){
      routeBuffer =
          new Route(attributes.getValue("name"), Integer.parseInt(attributes
              .getValue("limit")), new ArrayList<Location>(),
              new ArrayList<Location>());
      return;
    }
  }

  @Override
  public void characters(char[] ch, int start, int length) throws SAXException{
    super.characters(ch, start, length);
    if(length == 0)
      return;
    char[] ch2 = new char[length];
    System.arraycopy(ch, start, ch2, 0, length);
    String s = (new String(ch2)).trim();
    if(s.length() == 0)
      return;
    charList.add(s);
  }

  @Override
  public void endElement(String uri, String localName, String qName)
      throws SAXException{
    super.endElement(uri, localName, qName);

    if("location".equals(localName)){
      try{
        locationBuffer.setLatitude(Double.parseDouble(getChars().substring(0,
            getChars().indexOf(','))));
        locationBuffer.setLongitude(Double.parseDouble(getChars().substring(
            getChars().indexOf(',') + 1)));
        routeBuffer.addLocation(locationBuffer);
      }catch(Exception e){
        throw new SAXException(activity.getResources().getString(
            R.string.err_archive_not_valid)
            + "\n"
            + activity.getResources().getString(R.string.err_on_route_load)
            + " " + routeBuffer.toString() + ": " + e.getMessage());
      }
    }
    else if("radar".equals(localName)){
      try{
        radarBuffer.setLatitude(Double.parseDouble(getChars().substring(0,
            getChars().indexOf(','))));
        radarBuffer.setLongitude(Double.parseDouble(getChars().substring(
            getChars().indexOf(',') + 1)));
        routeBuffer.addRadar(radarBuffer);
      }catch(Exception e){
        throw new SAXException(activity.getResources().getString(
            R.string.err_archive_not_valid)
            + "\n"
            + activity.getResources().getString(R.string.err_on_route_load)
            + " " + routeBuffer.toString() + ": " + e.getMessage());
      }
    }
    else if("route".equals(localName))
      routes.add(routeBuffer);
    else if("routes".equals(localName)){}
    else
      throw new SAXException(activity.getResources().getString(
          R.string.err_archive_not_valid)
          + "\n"
          + activity.getResources().getString(R.string.err_unhandled_tag)
          + ": " + localName);

    charList = new LinkedList<String>();
  }

  private String getChars(){
    StringBuffer sb = new StringBuffer();
    for(Iterator<String> it = charList.listIterator(); it.hasNext(); sb
        .append(it.next())){}
    return sb.toString();
  }
}
